Whoa! I might be late in finding out about this, but I just went to visit the new(ish) Korean Super H Mart and it totally blew my mind. It is located just north of 10 West (the blalock exit if I remember correctly) and it is well worth a visit for anyone with any interest in Korean food.
The produce section alone is staggering. I had no idea that so many types of radishes or choy familiy veggies existed, or that they were so cheap. Add to that a huge selection of made-in-house kimchees and other banchan (although, the regular cabbage kimchee I tried was a little salty for my taste), a butcher department packed with amazingly beautiful thin sliced meats (I have never seen raw pork belly look so incredible), a huge seafood department, and an entire aisle filled with nothing but different kinds of chilli paste, and you have a grocery store well worth the trip. And that is not even mentioning the food court where you can get korean bbq, bibimbap, sushi, chinese food, korean fried chicken and more.
If that wasn't enough to convince you, how about this: when you purchase your groceries, they throw in a FREE grab bag of new sponges! How can you beat that?